Typewriting machine



' 1,617,468 15 1927' J. WALDHEIM TYPEW RI TING MAQHINE Filed June 4, 1924 Inventor? Afro/q v JOHN WALDHEIMjOF ELIZABETH; NEW/ JERSEY", ASSIGNOR TO UNDERWOOD TiYP'E- "NR1TER COMPAN Y, OF NEW' YORK, N. Y.,.A CORPGR-ATION OE DE'LAWA'RE.

This invention relates to typewritingmachines, especlally to ribbon vibrating, guiding and guarding devices as-used in connec tion therewith,. and more particularly to meansv for preventing the ribbon from foulingwvitli' the ty.pebar guide of an Under wood portable typewriter.

Ordinarily, whenv raising the platen, the lower. edge of the ribbon is carried high above the type-bar guide, and when the ribbon is lowered to its normal position there is apossibility for it to catch on the typeguide. This is apt tohappen when operatingrapidly, especially when the platen s lowered before the operator releases the typeke l t isth-erefore a feature of the invention to provide a combined. ribbon vibrator and shield whichwill effectively avoid such occurrences, and the'device is made extremely light to avoid overthrow of theribbon, due to acquired momentum in its rapid; movenient, and also to reduce effort on the part of the operator.

It is a further object to provide a combined ribbon vibrator and'shield that can be made from a single piece otsheet-nietal in an economical manner, and which can be substituted forcorresponding existing portionsot' a typewriting mechanism without material change in thesame. t

. Other features and advantages will hereinafterappear.

" In the accompanying drawings, 7 v

' Figure 1 is a partial front elevational view of an Underwood portable typewriting machine with the platen in lower-case position and the ribbon in'normal position below the printing. line, partsJbeing broken away to show the structure, the view also showing theapplication of an embodiment oft he. invention'.

Figure 2 is a transv-ersesectional' view of the same taken in a plane substantially on the line 2-2 of Figure 1'.

, Figure 3' isa view similar to Figurexl, but showing the platen 1n lower-case POSl- PQ SI DIODGCl to. print on.

'tion and" the ribbon the lower field. V V

Figure 4 is a view likeFigure 3, but shou ing"; the type-guide in its lowereclposition V and'ftheribbon still raised. F'gure 5 isa perspective view in detail of the: combined rri'bbon vibrator and shield.

gplateniraine moves, by screws TYPEWBITING MACHENE.

Application filed June 4, 1924. Serial no; 717,701.

Referring more in detail to the drawings, the numeral 10- designates a. fragmentary portion of a type-bar as used'with axtype writingmachine, the same. striking upon a;

platen 11, mounted on'a shaft 12,,j which is journaled, in the platen frame end plates these'plates being connected by cross bars 14 and 15 respectively at theffront and rear,

I nae and. supported on. carriage rails 16 and 1-7,

between. which bars and rails are interposed anti-friction elem-entsyas thejballs 18 and rollers 19, thus permitting the platen-frame to be moved easily l'engthwise ot a carriage support, generally. designated by thenumeral 20, this carriage support. being, shittahl'e into different horizontal planes by; the usual mechanism. (not shown) and which forms no part. ofthe present invention;

' Carried by the typewriter machine frame at the front is the usual slotted segment bar 21, and secured to it bY'SCIQWS is a rigid type-guide 23fhav1n'g upwardljg-extending fingers 24 providing betweentliem a guide slot 25 for engagement. with a"shoulde r'-1O? of the type-bar.

and numerals on the usual" scale 27 can be readily seen, and the lowenedgeof the openv Thetype-guide 23haslan opening 26 through which the graduations ing 26 is 'aised at its center, providin'gan index pointer 28 in register with the; print g' P S OD d ignated in Figures 1,3 and 4: bythe character X, I 1

A ribbon-vibrating meohanismfg enerally 1 designated by the numeral 30, includes a plate 31 fastened to the Ira-i l l6,.on ,whi ch1the from the printing pointX. Tlhev central 32; and eX- lapp d portion of the Platfifil containsian' elongated vertical .slot' 3& inwliich operates a' headed. stud 35," engaged in the vibrator 1 as hereafter eXplained,,and gib elements 36,

formed on the upper "edge o;'tlie plate 31, engage with the front cross bar 1& of the platen-frame assisting in; maintaining, it on the rail 16 An inwardly-projecting lever arm 37'of the vilirato-ractuatingmeehani= (not shown): isopera-tively connectedito the headed stud 35 and when in o eration moves the lever arm'i37 upwardly to bring :the usual ribbon 38 to the printingpoint, the

ribbon-.being'fed' lengthwise between spools h (not shown)1in the ordinarymanner.

i so

7' e;- "arisen are diverging loonm'embers or eyes "ribbon, which is passed 'fromone-loop-to the e foregoingfit will. be seen that The actuating mechanisms for the ribbonvibrator, spools and feed'arrangement :tor the ribbon, together with the case-shitting means for the platen, form no part ofthe v presentinvention, but are described in the quence,'that is, 'before'the type-bar is re-' leased, may causethe ribbon to engage the type. Such condition is conducive in cansing a portion of the ribbon, between its supporting arms andover the fingers ot the typeguide, tobecome slack and its edge to curl Whenthe type-bar and ribbcn-vibrator'return to their normal position." Such slack in the ribbon has a tendency during the loweringthereof to catch onthe type-guide fingers and cause annoyance to an operator. The purpose of the present invention is [largely to provide a combined ribbon vibra-. V tor and shield which positively prevents interference bet-ween the ribbon and typeguide. This device is indicated generally by the numeral 40 and shown in detail in P seen to be comprised of a single piece of sheet nietal 'shaped to present a pair otfopposed, outwardly-curvedarms, 4 1, having at their juncture a pendant lug 'i2fcontaining a perforation 43 engageable' with the stud 35; The upper, inner edge portions of the Jams 41 are provided with outstanding integral clips 44: to slidably engage with the up} rightelements 33 of the vibratorjsupport ,plate 31; At the upper extremities of the 45,}the front bar 46 of which contains opening 47 to permit entrance of theribbon. these loops being bent angularly forward and smoothly finished to avoid damaging the other across therear of the plate. V Extending inwardly from the arms 41,

ter of.the'-.-loops 45, are inreaching elements in length to the width ot'the ribbon, and -v having between them can open space 50 through which the type pass instriking upon theflribbon 38 disposed in front-of the plat- 7 From ,t; wheneverthe vibratorgactuating mechanism I operated, the combined vibrator and shield will be'raised, togetherwith theiribb on, pre sentingg'thezribbon totheprintingpoint and thereaft er lowered upon release of the key- I LE leven It is to be noted that the lower pornoes of the, shield elements 49 extend at all c Figure5 of the drawings, where it may be av-plane substantially"equivalent to the can 7 1 #1 -0 Projections 48 terminatingin verticalpar- .allell spaced shields or horns 4:9 equivalentv times below the lower edge of the ribbon thereby effectually preventing the ribbon from making contact with the type-guide, 1rrespective of their relative positions or move ment transmitted to the vibrator.

Variations may be resorted to within the scope ot'the invention, and portions of the i improvements may be used without others.

Having thus described my invention, I claim: v

1. In a typewriting machine, the combination with a type-guide, of a ribbon-vibrator having a substantially Ushaped body including npwardly-directed arms, ribbon-receiw mg eyes extendmg outward ad acent the ends ly-projecting horns carried upon the ends I 01"? said elements for preventing the ribbon from'fouling on said type-guide, the horns extending slightly below the bottom edge otthe ribbon. V r V 3. In atypewriting machine, the 'combi-. i nation with :a typeguide, of a ribbon-vibrato-r having a substantially U-shaped body including upwardlyrdirected arms, ribbonreceiving eyes extending outward adjacent the ends of said arn'1s-,'1-nreach1ng elements projecting toward the printing. point and overlying the ribbon, whereby ,to maintain' the ribbon in flat condition, andhorns-car ried upon the ends or said elements for pre venting thefribbon fromptoulingyon said type-guide, the horns extending" slightly below the bottom edge oftheribbon, and also having portions extending-upwardly adjacent the top edge of the. ribbon.

4. In a typewriting machine, the combinaztion with a type-guide, of a ribbon-vibrator having a substantially ,U-shaped' body'ineluding upwardly-directed arms,fa" 'ribbonreceiving eye adjacent the endof -eacharm, the eyes being disposed angularly outward in opposite directions from the sides of. the arms and directed toward the front, inreaching elements projecting toward the printa ing point and overlying the mid-section of the ribbon, and horns carried by the en -V of said elements, the horns having portions 7 extending downward and terminating at points below the bottom edgefof the ribbon,

said horns also having portions extending upward to points adjacent the top edge of said ribbon.

5. A ribbon-vibrator for a typewriting machine having a body including a pair of upwardly-extending arms, eyes carried by said arms for receiving and guiding a ribbon, ribbon-shielding elements extending inwardly toward one another from the arms, and horns carried by the ends of said elements and including ribbon-shielding portions extending both above and below said elements, the ribbon-guiding eyes being so disposed relatively to said horns that the lower portions of the latter extend below the bottom edge of the ribbon, while the upper portions of said horns extend to points adjacent the top edge of the ribbon.

6. In a typewriting machine, the combination with a type-guide secured to a fixed part of the machine, of a vibrator arranged to receive aribbon and to oscillate the same into difierent horizontal planes adjacent the type-guide, said vibrator including widely spaced loops for supporting the ribbon, and inreaching ribbon-shielding elements carrying vertically-disposed horns tern'iinating below the lower edge of the ribbon. at each side.

vertically-disposed horns, the lower ends thereof terminating below the bottom edge.

of the ribbon at each side of the printing point, the horns also including portions extending upward to points adjacent the top of the ribbon. V

8. In a t-ypewriting machine, the combination with a-type-guide, of a ribbon-vibrator including a pair of widely spaced divergent arms having loops at their ends for reception of a ribbon, and ribbonshielding members extending inwardly of said loops, inte-rjacent the ribbon and type-guide, to maintain the wide stretch of ribbon in flat condition,

said members also carrying vertically-an.

ranged horns disposed on opposite sidesof the printing point and terminating below" H the bottom edge of the ribbon, said horns preventing the ribbon from fouling on said type-guide. V

. JOHN WALDHEIM. 

